Stop for talking-machines.



, the tone arm and also that part that is` in sa? d AN'TI-IOINY F. ZEGA, OF NEWARK, NEW JERSEY.

STOP FOR TALKING-MACHINES.

Specification of Letters Patent.

Patented J an. 21, 1919.

Application filed February 5, 1917. Serial No. 146,554.

To all whom it may concern.'

Be it known that I, ANTHONY F. ZEGA, a citizen of the. United States, and a resident ot Newark, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Stops for Talking- Machines, ot' which thefollowing is a specication..

r1`his invention relates to an improved stop for talking machines and is adapted` to operate a brake when the reproduction is finished, the brake being operated' through intermediate mechanism from the tone -arm which is swung slowly by the pitch ot the record groove in which the needle 0i the reproducer travels.

The invention is further designed to provide a stop of this kind by means of which the brake can be manually operated, that part of the mechanism that is operated from operated manually being yieldingly heldin locking or stopping position by a single spring.

The invention further consists in a stop mechanism in which the stud on the tone arm and the arm engaged by the stud, the engagement of which parts operates the brake to stop the record table, are arranged u so that they can be adjusted relative to each other so'that the point where the reproducer needle is on the record caribe approximately tixed when said stud and arm come in` contact. This adjustment is devised because on ten and twelve inch records the average reproducing groove .is a certain distance from the center oi the recoi'd. On seven inch records and on six inch records the end of the groove is much closer to the center of the table and the tone. arm is swung` in further before the reproduction is finished, and the engagemeut'oi these operated parts must therefore be deferred On the smaller records.

The invention is further designed `t0 provide amachinc of this kind in which the ordinary record can be employed. but 1 also use a record in connection with this device in which the movement ot the tone arm is accelerated when the reproduction is finished so that the tone arm is swung rather sharply toward the center of the record. and a positive stopping at once results.

' The invention is further designed to provide a stop ot the kind above described which is somewhat sensitiv? and easily operated and is practically noiseless, since it is accompanied by no unpleasant clicks or thuds incidental to its operation.

The invention is illustrated in the accompanying drawings, in which Figure 1 is a top view o't` the device and also illustrating enough of the phonograph case to indicate the cooperation of the parts, and also illustrating a. record provided with the grooves in extension ot the record or reproducing groove to positively operate the stop actuating device when the reproduction is finished. Fig. 2 is a side view of the construction illustrated in Fig. 1, and Fig. 3 is a detail view showing a part of the stop mechanism shown in Fig. 1 with some ofthe parts broken away and with the spring removed to more clearly show the parts underneath. Fig, 4 is a section on line 4-4 in Fig. 1. Fig. 5 is a top view, and Fig. G is a side view of a modiied form of stop mechanism. Fig. 7 is a top view of still another modification, and Fig. 8 is a side view of the device shown in Fig. 7. Fig. 9 is a section on line 9--9 in Fig. 7.

In the drawings 10 represents the phonograph case through the top of which projects the post l1 which is driven by a motor which is usual in machines of this kind and on which is mounted a table 12 which revolves with the post 11, the table 12 having a fiange 13 (Fig. 5) which projects downward and against the inner face of which the brake operates. A tone arm 14 is mounted to swing in any usual way, the form shown employing a bracket 15 on which the large end of the tonel arm swings, the end of the tone arm being provided with a, reproducer 16 carrying a needle 17 which 'travels in a groove 18 on the top face of the record 19, the groove 18 being adapted to rcprodru-e, through the needlel 17, a reproduction .which is transmitted to the tone arm and then out through a suitable amplitying device. The locking mechanism is preferably disposed beneath the record table and can he mounted directly thereon, but in order to insure smooth operation of the parts and to make a more unitary structure o't it, I employ a base plate 20 which is fastened to the top cabinet 10 and has pivoted thereto a hub Q1 which has ,a finger 22 fastened thereto. this finger being preferably struck up from the Ahul) and it is provided with a brake 23, usually of. vibrous material or felt so as to give a positive frictional engagement of the flange 13 with the record table and to make such engagement noiseless. A handle 24 extends from the hub 21 and provides means by which it can be manually operated to release or to set the brake 23. A tripping arm 25 is operated from the hub and for this purpose is preferably secured thereto as at 26 and is held in position and permitted to slide by suit` able mechanism, 'the form illustrated comprising a pin 27 which is fastened to the base plate 20 and slides in a slot 28 iii-the tripping arm 25, the tripping arm having a projection 29 thereon and its end 30 ben ing tapered. Slidably arranged on the base plate 20 is aA slide member 30 which can be held in position by any suitable means, such as `the pins 31, which project up through the slots 32 and are headed so as to hold the slide in position, the slide hav# ing a recess 33 which is longer than the projection 29, thus allowing a little play for the projection of parts, which will be described hereinafter. On .the end ofthe base plate 20 opposite the hub 21 is a detent 34 oscillating on a suitable pivot 35, the detent having the hub portion 36 through which the pin 35 passes. The detent 34 has a nose 37 which is adapted to lit into a recess 38, the end of the detent 39 being tapered and be ing adapted to lit against the tapered endA 30 ofthe tripping arm 35. An arm 40 has a hub through which the pin 35 passes, the arm whenswung in one direction pulling the detent on'its pivot, the parts being connected in any suitable Way, in the form shown being connected by means of a screw 41 screw-threaded into a boss 42 struck up from the hnb of the arm 40, the screw having its head 43bearing, against a boss 44 struck up from the detent, the boss 44 being preferably slotted as at 45 to give a litt@ side motion to the screw so that the arm 40 can be moved in reverse direction without bending or breaking ,any of the parts, but when moved forward to swing the detent it positively engages the detent, this screw adjustment being adapted to be pern'ianently made when the stop n'iechaisin is installed in the machine and not necessarily altered unless it to adapt it to a particular type of machine on which it is installed.

`A spring 46 connects the dctent and the slide, such connection being preferably made by passing the ends of the spring over a pin 47 on the detent and a pin 48 on the slide. The arm 40 is adapted to be engaged by a stud fastened to the tone arm of the machine, and when the needle 17 reaches the end of the reproduction and is traveling in the excessgroove beyond the reproduction point, the records being provided with such excess groove, the stud on the tone arm,

`which will be hereinafter described, engages pulls on the slide which in turn 4pulls on the l tripping arm 25 which is free to be moved, since in the swinging of the detent the end 39 cornes away from the end 30 Aof the tripping arm.4 The tripping arm lwhen thus pulled by the slide, under the influence of the spring 46, swings the hub 21 and forces the brake 23 against the flange 13 of the' record. table and the record is stopped.

One form of attachment for the tone arm is villustrated in Figs. 1, 2 andf4, andcomprises a bracket 49 preferably` formed of sheet metal and riveted as atOto the tone "arm, although other means of securing it may be employed, the bracket being made of sheet metal and being bent to form bearings 51 and 52 and also to form a table 53 having stops 54 and 55 on it, the bearings acting to support a shaft 56, the shaft having on the top an index hand 57 with a handle 58 for operating it, the handle 58 having its bottom edge formed into a head 59 which tltsinto any of the several recesses 60 in t-he plate 53', the index hand 57 thus being stopped when the head engages such recesses and being adapted to be manually lifted or slid therefrom When desired, but being held tight enough to prevent accidental movement of the index hand. The index hand is held downby means of a spring 61 which bears against the lower bearing 52 and also against an arm 63 which hasta squafe hole fittinginto a square end 64 ofthe shaft 56, the arm 63 carrying at its lend a stud which depends so that it engages the arm 40 to bring about the stoppingmotion above described. The ends of ten andtwelve inch records, that is, the inner ends of the record swinging the arm 635by means of the handle4 58, and in this Way the stop isn-nido in a sense universalsince it can be adapted for different forms of records without the necessity of previously lnovingtlie tone arm over to a position Where the reproduction stops and then adjusting the stopping device to this position. When a ten linch record is put on, the 'index hand 57 is swung to indicate the point where the indexen the table 53 indicates such record, and ythis swings the stud to a point where it will engage the arm 40 when the reproduecr needle has moved the tone arm by reason. of the yend the detent outward, the 'movement of the trippin arm incidentalu'to the movement iiandle 21 being possible by reason of the recess 33 being longer than the projection 29, and when the' detent has been moved out far enough the projection 47 leaves the recess 38, whichis a comparatively shallow recess, and-"the spring46 is again under a slight tension, the slide. 30 moves longitudinally and the parts are in positioii to hold the brake 23 against the fiange of the record'table. y

The device is reset by pulling back on the handle 24 which slides the tripping arm which in turn causes 'the slide 3() vto move, such movement of the slide giving a ten,- sion to the spring 46 whichswin s the detent into position, the projection 7 `and the recess 38 coming together to lock the parts, the brake is released and therecord table is free to revolve.

In the modification shown iii' Figs. 5 and 6 the detent and the brake arm are the same as in the previously described gures, the tripping arm 66, however, `being without projection on its side and beingmounted so as to be secured by the pin 67 so that it has no movement relative to the hub 21. The pin 67, however, instead of being positively secured to the slide 68, works in a slot 69 in the slide so that when the hub 21 is swung 24 being pushed from the position shown in Fig. 5,-the trip- .ping arm 6G is moved forward so that the abutting edges 30 and 39, by reaso-n of their being inclined, force the detent out, the latch remains stationary ,until the projection 37 is moved troni the recess 38 and then the spring 70 snaps the slide (SS so as to bring the end ot the slot '69igiiiiist the pin 67 and the slide is then free to pull, under the influence of the spring 70, on the hub 21 to force the brake 23 against the turntable or record table.

v ln the modification shown in Figs. 7 and 8 the brake and the tripping arm and also the slide are similar to the constructions shown in Figs. 1 andi), but, there is a difference in the adjusting meeliaiiism, asy the detent 71 has a hub 72 (Figs. 8 Aand 9) which is between the hub 73 of the'pointcr 74 and the huh 75 of thev arm 76. Thearm 7G is adapted to be engaged by the l stud 77 of the tone arm 14. which stud in this construction is fixed in its relation to the tone arm. The hubs 72, 73 and 75 are arranged around the eyelet 7 8, the bottom ends of the eyelct. being headed as at479 and having an annular groove into which the edge of the slot 8() ot a spring disk oiwasher 8l fits. The eyelet is held in place l18 merging into part by u sind 's2 which is fastened ai its bottom, as at 83, to the base plate 20. The pointer arm 74 is connected by a screw S1 to the arm '76 and is provided on its outer end with a suitable handle by means of which it is operated, the pointer being adapted to register on a plate 86 which is suit-ably graduated and has a .loop 87 struck up from it to hold the pointer arm 74 in place. l/Vhen the pointer arm is swung to indicate the size of the record with which the stop is to be used, it operates, by means of the friction disk 81, to swing the arm 7G with it, the pointer arm when being swung down ha' ing no eti'ect on the detent 7l because the detent 71 bears against the slide 30, and when it is moved upward, which is usually the case, that is,

before the record begins to play, thev detent rests against a stop S8, preferably struck up from the base plate Q0. The spring 4G in this construction performs the same function asin the construction shown in Figs. 1 and 2, that is, it tends to pull the slide, the tripping arm, and consequently the brake, when the detent is swung to a releasing position.

The average phonograph record has usually enough additional groove beyond where the reproduction stops to move the tone arm sufficiently to operate the brake, but in order to be'assured of suoli stopping, I prefer to use a i'ecordin which the groove is continued with a sharper curve toward the center of the record. Such record is shown in Fig. 1, the reproducing part. ot the groove Si) which vis a continuatioii of the record groove but has a sharper spiral so that the tone arm is positively moved and thus acceleratedv in its movement toward thel center of the record and gives a decided and sharp push to the arm 40. A similar sharper spiral groove or groovcs`90 can be installed at the plain edge of the groove, that is, on the space between Where the record groove begins and the outer edge of the record. so that there is no danger ot the needle, after being placed on this .smooth part, ruiming ofl the edge of tho record and thus scratching up the -telt with which the turntables are usually covered and making a discordant. iasping sound, and the talking machine, a brake` a handle to operate and a tripping arm connectt-id to the brake, the handle and adapted to trip the detcnt and lto have a limited sliding contact, relative to the, slide.

2. A stop for talking machines comprising a slide, adetent for the slide, a spring connecting the slide and the detent, an arm to operate the detent from the tone arm of the talking machine, a brake, a handle to operate the brake, a tripping arm connected to the handle and adapted to trip the detent and to have a limited sliding contact relative to the slide, and means for relatively adjusting the means on thc tone arm and the arm on the detent.

3, A. stop for talking machines comprising 'a slide, a detent having an arm thereon and ineansfor locking the slide, a trip having a brake thereon and provided with :i handle, for its manual operation, coacting means on the slide and on the trip to permit a limited sliding contact between them, and a spring eonnpctiiig the detent and the slide,

el.. A stop for talking machines comprising a slide, a brake having a handle thereon, a ti'iplgiing arm on the brake and having a connection with the slide, detent having a connection with the slide and with the tripping arm, a. spring connection. between the slide and the dctent, Whereb y the handle can be operated to set the slide and also be operated to trip the detent, and an arm on, the dctent adapted to be operated by the tone arm of a talking,` machine.

5. A stop for talking machines comprising a spring actuated slide, a spring operated detent, an arm to operate the detent from the tone arm of a talking machine, a combined tripping and locking mechanism adapted to engage both the slide and the detent, a brake connected to the combined tripping and locking mechanism, and a handle connected to the brake whereby the brake and the combined tripping and locking mechanism may be manually operated 6. A. stop for talking machines comprising a spring actuated slide, a spring operated detent, an arm to operate the detent fromr lie tone arm of a talking machine, a combincd. tripping and locking mechanism adapted to engage both the slide and the detenta, a brake connected to the combined tripping and locking mechanism, and means for shifting the point ai contact at .which 'the arm on the detent and the arm on lthe tone arm come in contact to release the detent, said means including a pointerarm, and an indicator whereby said point of Contact can be selected.

7. A stop for talking machines comprising a hub having a brake and a handle thereon, a

' tion of the lock but yielding'to manual oper.-

swinging deteiit arm, a detent secured to the hub, which dctent is swung with the deleiit arm, a slide having means concting with the detcnt arm 'lior locking the slide against sliding inoveinent, and a tripping arm having a. limited sliding contact relative to the slide, the tripping arm and the dell neeaaia tent having their abutting ends constructed so that when the handle of the brake is swung the tripping arm swings thefdetent.

8. A stop for talking machines comprising a vspring actuated slide, a brake havinga handle thereon for its manual operation,l aV

detent, atripping arm connected to the brake` and having its end ladapted to abut on the end of thedetent, said abutting ends being tapered, co-acting means on the slide and the detent to prevent the slide from moving when engaged by the detent, co-acting means on the slide and the tripping arm and permitting a limited sliding movement relative to one another, an arm on the detent, and means on the tone arm of a talking ina- 4chine for engaging the arm on the detent.

9. stop for talking machines comprising a spring' actuated slide, a brake having a handle thereon for its manual operation, a

detent, a tripping arm connected to the brake and having its end adapted ;to abut on the end oil? the detent, said abuttingends being tapered, co-actmg means on the slide and the deteiit to prevent the slide from moving a detent, a tripping arm connected to the brake and having its end adapted to' abut on the end of thev detent, said abutting ends being tapered, co-acting means on the slide and the delent to prevent the slide from moving When engaged by thev detent, co-acting means. on the slide and the tripping arm and permitting a limited sliding movement relative to one another, an-arm on the detent, means on the tone arm of a talking machine for engaging the arm on the detent, means for changing the point of Contact betweeny the arm on the detent and the means on the tone arm, said means embracing a pointer, a l scale on which said pointer operates for iii-'y dicating said point of Contact, a handleponv said pointer, and means for holding the pointer in predetermined positions,y saidl means resisting displacement in the operaation.

In testimony that I claim the foregoing, Iv

reef- L hereto set my hand, this 30th day of January, 1917.

ANTDNEY F. ZEG, 

